已知四棱锥P-ABCD中,底面ABCD为菱形,
,过侧面
中线AE的一个平面
与直线PD垂直,并与此四棱锥的面相交,交线围成一个平面图形。
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/bbfddf4c-825d-4ff3-aabb-b7eca31338c1.png?resizew=211)
(Ⅰ)画出这个平面图形,并证明
平面
;
(Ⅱ)平面
将此四棱锥分成两部分,求这两部分的体积比.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f59675193ae3ad89cc93503cf095a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/bbfddf4c-825d-4ff3-aabb-b7eca31338c1.png?resizew=211)
(Ⅰ)画出这个平面图形,并证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(Ⅱ)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
19-20高三·辽宁大连·期末 查看更多[3]
2020届辽宁省大连市高三双基测试数学(文)试题2020届高三2月第01期(考点07)(文科)-《新题速递·数学》(已下线)专题07 点、线共面问题的证明与探索(第三篇)-备战2020年高考数学大题精做之解答题题型全覆盖
更新时间:2020-01-29 16:20:50
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相似题推荐
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】(1)设
,求点
与点
间距离的最小值;
(2)如图所示,一圆锥的底面半径与高都是6(
),在圆锥内部有一个内接的倒置小圆锥(小圆锥的底面平行于大圆锥的底面,小圆锥的顶点位于大圆锥的底面中心),其中小圆锥的底面半径为r(
),高为h(
),求小圆锥体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fb40a36a293471742ce75f6b9635b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51752b2f4c7233ee29c83d8ce09ad576.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdebfa07f9b53d79d119cd3a1048e78a.png)
(2)如图所示,一圆锥的底面半径与高都是6(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://img.xkw.com/dksih/QBM/2020/10/11/2568884001316864/2568943963242496/STEM/d18a5d61e30249c99f028a35d14edf24.png?resizew=188)
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解答题-问答题
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【推荐2】在三棱锥
中,
,三棱锥
的体积为
,
在平面
内射影为点
.
(1)证明:四边形
是矩形;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/613e60b42d512b806decb810474df0a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)证明:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a438393ddfc7da1804baf4932442bb35.png)
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解答题-作图题
|
适中
(0.65)
解题方法
【推荐1】在正方体
中,
是棱
上异于顶点的动点.
(1)用斜二测画法作出正方体及过
三点的截面的图形,直接写出该截面图形的形状;
(2)若
是棱
的中点,求正方体被(1)中的截面所截得两个几何体的体积之比.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
(1)用斜二测画法作出正方体及过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cda66f976efa629a8f0f517e2efc417.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
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解答题-作图题
|
适中
(0.65)
名校
解题方法
【推荐2】如图,在棱长为
的正方体
中,
,
分别是
,
中点,过
,
,
三点的平面与正方体的下底面
相交于直线
.
的位置,并说明作图依据;
(2)正方体被平面
截成两部分,求较小部分几何体的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)正方体被平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193b5b41994c2a4dfa5bb0bc984061cc.png)
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解答题-证明题
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解题方法
【推荐1】如图,在四棱锥
中,四边形ABCD是直角梯形,
,
,
底面ABCD,
,
,E是PB的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/13/90867ed8-89e3-4774-9fe5-dd6b713254cf.png?resizew=234)
(1)求证:平面
平面PBC;
(2)若二面角
的余弦值为
,求a的值;
(3)在(2)的条件下求直线PA与平面EAC所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89ee6576c35c682bcb0eff43bd958d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89a2827eae3985793ef13b451fe538ff.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/13/90867ed8-89e3-4774-9fe5-dd6b713254cf.png?resizew=234)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/677d1863ff4d8ac1604b18149d4f320f.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5102c216393e133fa25dba98cd78535.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
(3)在(2)的条件下求直线PA与平面EAC所成角的正弦值.
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解答题-证明题
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【推荐2】如图,已知圆锥
,
是底面圆
的直径,且长为4,
是圆
上异于
,
的一点,
,
,取
的中点
,连接
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/c1047c78-0870-4272-9dd1-ad125f9c3107.png?resizew=178)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967f74b8993c61634ceed95edca05ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e20c1b7f55cd8e68a7c3aa58bc944c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/c1047c78-0870-4272-9dd1-ad125f9c3107.png?resizew=178)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8258b1f1a4e5b02fe070204359fe79d1.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf29d07c3751c41ab3503065a5a5052e.png)
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